Subject: Re: [stella] The Demo Image Series #5 - PAL & NTSC Compatible From: "Eckhard Stolberg" <Eckhard_Stolberg@xxxxxx> Date: Wed, 19 Feb 2003 15:26:28 +0100 |
> All these sample images use P1 difficulty switch to switch between PAL and > NTSC version. That's F7/F8 on my Z26. Note, Z26 (my version, anyway) > doesn't recalc the palette once it thinks its a PAL game (that is, colours > are OK when you start, OK when you switch to PAL mode (F8) but aren't OK > when you go back to NTSC (F7)). And sometimes it doesn't seem to work > properly at all - but does the next time its run. Could be a bug with me... > or Z26. We'll find out once I get a report from hardware owners who test > these binaries on a Cuttle cart :) It's not really a bug in z26. Our autodetection system is just set up for games that are either PAL or NTSC. ;-) We assume every game to be NTSC. Only when a game does several stable frames with more than 290 (I think) scanlines during the first 256 frames of emulation, we switch to PAL and stay that way. So if you hit F8 during the first four seconds, PAL mode still does get automatically detected. To set the palette in z26 you can either use the -cN command line switch, where N can be 0=NTSC, 1=PAL or 2=SECAM, or you can use the '-' key (right of '8 9 0'). This will also switch between NTSC -> PAL -> SECAM -> NTSC. > Could some PAL-capable guys let me know how this sprite system looks on PAL > TVs? The refresh rate is lower on that TV standard, so I'd like some > detailed feedback, if possible. I think it looks great. I an't find any problems. The flicker is a bit more noticeable than at 60 Hz, but that isn't much of a problem, especially with animated images. I guess PAL users are used to flickering TV pictures. ;-) But if you fear that 50Hz might be too low, you could always use a 60Hz display with PAL colours. Usually PAL TVs are able to handle a 60Hz signal. My multi-standard TV even switches to NTSC resolution with PAL colours when I play a 262 line game on my PAL VCS. Most TVs will show black bars at the top and bottom of the screen though. But if you aren't planning to use these areas or to change the aspect ratio of the pictures anyway, that doesn't make much of a difference. Ciao, Eckhard Stolberg ---------------------------------------------------------------------------------------------- Archives (includes files) at http://www.biglist.com/lists/stella/archives/ Unsub & more at http://www.biglist.com/lists/stella/
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